/*
 * MIT License
 *
 * Copyright (c) 2023 北京凯特伟业科技有限公司
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package com.je.bpm.engine.impl.db;

import com.je.bpm.engine.impl.cfg.IdGenerator;
import com.je.bpm.engine.impl.cmd.GetNextIdBlockCmd;
import com.je.bpm.engine.impl.interceptor.CommandConfig;
import com.je.bpm.engine.impl.interceptor.CommandExecutor;

public class DbIdGenerator implements IdGenerator {

    protected int idBlockSize;
    protected long nextId;
    protected long lastId = -1;

    protected CommandExecutor commandExecutor;
    protected CommandConfig commandConfig;

    @Override
    public synchronized String getNextId() {
        if (lastId < nextId) {
            getNewBlock();
        }
        long _nextId = nextId++;
        return Long.toString(_nextId);
    }

    protected synchronized void getNewBlock() {
        IdBlock idBlock = commandExecutor.execute(commandConfig, new GetNextIdBlockCmd(idBlockSize));
        this.nextId = idBlock.getNextId();
        this.lastId = idBlock.getLastId();
    }

    public int getIdBlockSize() {
        return idBlockSize;
    }

    public void setIdBlockSize(int idBlockSize) {
        this.idBlockSize = idBlockSize;
    }

    public CommandExecutor getCommandExecutor() {
        return commandExecutor;
    }

    public void setCommandExecutor(CommandExecutor commandExecutor) {
        this.commandExecutor = commandExecutor;
    }

    public CommandConfig getCommandConfig() {
        return commandConfig;
    }

    public void setCommandConfig(CommandConfig commandConfig) {
        this.commandConfig = commandConfig;
    }
}
